SSRF Joint Restricted Frequency List (JRFL)

A Joint Restricted Frequency List is a list of frequencies that must
receive various degrees of protection. JRFL frequencies are either
Taboo, Protected or Guarded

Introduction

A Joint Restricted Frequency List is a list of frequencies that must be protected while friendly
offensive EW operations are taking place. [Ref CJCSM 3320.01] The Joint Restricted Frequency List (JRFL) is a list of frequencies that must
receive various degrees of protection. The JRFL contains frequencies that assigned to one of three
categories: Taboo, Protected or Guarded.

TABOO

Any frequency of such importance that it must never be deliberately jammed or interfered with by
friendly forces. This includes international distress, stop buzzer, safety and controller frequencies.
Component operations and communications elements designate and update this list.

PROTECTED

Friendly forces operational frequency of such critical importance that jamming should be restricted
unless necessary or until it is coordinated. Component operations and communications elements
designate and update this list.

GUARDED

Enemy frequencies currently being exploited for combat information and intelligence. This list is
time-oriented in that the list changes as the enemy assumes different combat postures. These may
be jammed if the Information Operations (IO) cell determines the operational gain is greater than the
information lost. The J-2 (Intelligence Officer) designates and updates this list.

Roles, Responsibilities And Procedures

The JRFL must be compiled in co-ordination between J6 (Communications), J3 (Operations) and J2
(Intelligence) communities. This coordination is necessary because frequencies used by J2 (for
intelligence collection or other purposes), by J3 (for EW/INFO OPS purposes), and by J6 (for
command and control), must be deconflicted.

Business Use Cases For JRFL Definition

JRFL Business Process

The Table of Allocation provided by the Host Nation should be imported and stored in the respective
spectrum management systems.
The business process is detailed in the Activity Diagram below.

Activity Diagram for JRFL Definition

Data Object

JRFL is the XML root for all parameters of a JRFL. It inherits attributes and
sub-elements from element Common.
Sub-Element is JRFLEntry.